Promblem with creating sharp glossy glossy material for metal drinking bottle
First of all: if you want to have reflections on your bottle you need something in your scene to show in the reflection. as of now, you just have your light source, a grey plane and the ground background. that's not ideal to check how your material reflects things. (read the answer here why those wavy reflections appear).

I'd recommend using an HDRi to light your scene. here you can grab some for free.

Material:
I'd recommend using the principled Shader. it uses Fresnel to make the reflectiveness be dependent on the view angle.



that's a pretty basic setup, but you can work from there. I'd also recommend using a normal- or displacement map to mimic the bumps of your bottle.